[docs] [issue14034] Add argparse howto

[Roundup Robot]

Roundup Robot <devnull at psf.upfronthosting.co.za> added the comment:

New changeset 549aa1460811 by Ezio Melotti in branch '2.7':
#14034: adapt to Python 2 and fix indentation.
http://hg.python.org/cpython/rev/549aa1460811

New changeset d5b7be0629c0 by Ezio Melotti in branch '3.2':
#14034: fix indentation.
http://hg.python.org/cpython/rev/d5b7be0629c0

New changeset e14c860f6eee by Ezio Melotti in branch 'default':
#14034: merge indentation fixes from 3.2.
http://hg.python.org/cpython/rev/e14c860f6eee

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